Supplemental Information - Schedule of Revenues by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenues	$ 52,125	$ 34,880	$ 177,026
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenues	37,802	29,160	134,688
EMEA
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenues	13,874	5,667	42,035
Japan
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenues	$ 449	$ 53	$ 303